TM 5-4520-241-14
Table 5-1. Direct Support and General Support Troubleshooting - Continued
MALFUNCTION
TESTING OR INSPECTION
CORRECTIVE ACTION
4 - Continued
Step 3.
Check continuity through bimetallic heater/sensor. Refer to figure 5-9 and check continuity from V4
and V5, and between V2 and V3. There should be resistance across each pair of terminals, but if
either is open, replace the bimetallic heater/sensor as an assembly.
Unsolder four wires from heater/sensor to terminal strip in time delay assembly. Remove two
screws (1, fig. 5-10) and washers (2), and pull off insulators (3) and heater/sensor (4). Install in
the reverse order of removal. Connect the two white wires from inside the heater/sensor to V2
and V3. Connect the two wires from the outer wrap to V4 and V5. Use rosin core electrical
solder, and spray with moisture repellent conforming to MIL-V-173.
1. Screw
4. Bimetallic heater/sensor
2. Washer
5. Mounting shelf
3. Insulator
Figure 5-10. Bimetallic heater/sensor installation.
5-19
